EP 0922125 A1 19990616 - METHOD FOR ELECTROCHEMICAL PHOSPHATING OF METAL SURFACES, PARTICULARLY STAINLESS STEEL, AND APPLICATION OF AN AQUEOUS PHOSPHATING SOLUTION FOR SUCH A METHOD
Title (en)
METHOD FOR ELECTROCHEMICAL PHOSPHATING OF METAL SURFACES, PARTICULARLY STAINLESS STEEL, AND APPLICATION OF AN AQUEOUS PHOSPHATING SOLUTION FOR SUCH A METHOD
Title (de)
VERFAHREN ZUR ELEKTROCHEMISCHEN PHOSPHATIERUNG VON METALLOBERFLÄCHEN, INSBESONDERE ROSTFREIER STAHL, UND ANWENDUNG EINER WÄSSRIGEN PHOSPHATLÖSUNG FÜR DIESES VERFAHREN
Title (fr)
PROCEDE DE PHOSPHATATION DE SURFACES METALLIQUES, NOTAMMENT D'ACIER INOXYDABLE, ET APPLICATION D'UNE SOLUTION AQUEUSE DE PHOSPHATATION DESTINEE A UN TEL PROCEDE
Publication
Application
Priority
- DK 9700344 W 19970826
- DK 91096 A 19960829
Abstract (en)
[origin: US6346186B1] A method for electrochemical phosphating of metal surfaces, particularly stainless steel, in connection with cold forming of metal workpieces, which method provides the cold formed workpiece with a lubricant after phosphating, involves an electrochemical phosphating through a cathodic process applying an aqueous phosphating solution containing0.5 to 100 g Ca2+/l0.5 to 100 g Zn2+/l5 to 100 g PO43-/l0 to 100 g NO3-/l0 to 100 g ClO3-/l and0 to 50 g F- or Cl-/lby which the temperature of the solution is between 0 and 95° C., the pH-value of the solution is between 0.5 and 5, and the current density is between 0.1 and 250 mA/cm2. This gives a good lubrication effect, a good adhesion to the metal surface, particularly stainless steel, and a more expedient texture than ordinary phosphating.
IPC 1-7
IPC 8 full level
C25D 11/36 (2006.01); F16L 5/02 (2006.01)
CPC (source: EP US)
C25D 9/10 (2013.01 - EP US); C25D 11/36 (2013.01 - US); F16L 5/02 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LI SE
DOCDB simple family (publication)
WO 9809006 A1 19980305; AT 412095 B 20040927; AT A908997 A 20040215; AT E327359 T1 20060615; AU 3938597 A 19980319; CH 693233 A5 20030430; DE 19781959 B4 20080911; DE 19781959 T1 19991014; DE 69735944 D1 20060629; DK 173338 B1 20000731; DK 91096 A 19980301; EP 0922125 A1 19990616; EP 0922125 B1 20060524; GB 2331997 A 19990609; GB 2331997 B 20000726; GB 9903745 D0 19990414; SE 517530 C2 20020618; SE 9900699 D0 19990226; SE 9900699 L 19990226; US 6346186 B1 20020212
DOCDB simple family (application)
DK 9700344 W 19970826; AT 908997 A 19970826; AT 97936615 T 19970826; AU 3938597 A 19970826; CH 33799 A 19970826; DE 19781959 A 19970826; DE 19781959 T 19970826; DE 69735944 T 19970826; DK 91096 A 19960829; EP 97936615 A 19970826; GB 9903745 A 19970826; SE 9900699 A 19990226; US 63374800 A 20000807